Carrier DHMVHA Service Manual page 34

:
DIAGNOSIS AND SOLUTION (CONT.)
Inverter Compressor Drive Error (PC04)
Error Code
Malfunction decision conditions
Supposed causes
Troubleshooting
Check the wiring between
the main PCB and the compressor.
Check the outdoor fan and the
outdoor unit ventilation.
Check the compressor
resistance values.
Replace the outdoor main PCB.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
PC04
An abnormal inverter compressor drive is detected by a special detection circuit, including communication
signal detection, voltage detection, compressor rotation speed signal detection, etc.
Wiring mistake
IPM malfunction
Outdoor fan assembly faulty
Compressor malfunction
Outdoor PCB faulty
No
Check the IPM.
Yes
Yes
Yes
Correct the connection or replace
Yes
the wires and connectors.
Replace the IPM board or replace
No
the main PCB.
Refer to the
No Fan Speed Has Been Out of Control
malfunction solution.
No Replace the compressor.
34